Spawning Medic's projectile sheild from a map entity?

Hi, working on a thing and I need a barrier that works similarly to medic's shield or the blue-barriers in overwatch.

I was able to abuse the func_physbox_multiplayer entity to get a wall that players can walk through but not shoot, however this blocks the bullets from both teams and doesn't play well with filters.

I noticed this thread https://forums.alliedmods.net/showthread.php?t=232252 mentions that the medic barrier does work in regular TF2, however I wasn't able to get the shield to appear in my map with the ent_create command (doesn't even appear in report_entities), so idk if I would be able to do it from a map entity.